Programming is 100% correct, I program my gear ratio changes with the correct method and not the skew method which is the difference with one program versus the other. I had 3.69s on my GTP, I've programmed for 3.69 gears a few times before!!!!!!!
Same trans was shifting nice on the previous gears when I in-car tuned it a few months ago. Same pressure settings on the new 3.69 gears. See how it is after you reset the computer.